For me, the greatest joy I get in life is feeling a sense of progress. I feel the most depressed or sad when I feel like I am backtracking on my progress, or getting weaker.
For example, my greatest joy is to feel incense my strength ascending, especially with my deadlift and physical power. I am the most sad and depressed when I feel like my physical strength is waning, and that I’m getting weaker.
Then perhaps the best mode of action and advancement in life is to just put yourself in a position in which you will not backtrack. In other words, best to think of very very slow indefinite gains, rather than quick gains, tomorrow marred by huge setbacks.
This is how bodybuilders and powerlifters who use steroids, testosterone, human growth hormones, etc. are very shortsighted; if you put yourself in a position where your body can no longer naturally produce testosterone, you are in a very bad and fragile situation. Better to be a Jay Cutler who is still swole, rather than a Ronnie Coleman, who is now essentially permanently disabled. And no matter how many human growth hormones, stem cell therapy’s, money and medical expertise, Ronnie Coleman will never be strong again.